Publication Date:
2001-09-22
Description:
Species richness in the tropics has been attributed to the gradual accumulation of species over a long geological period in stable equatorial climates or, conversely, to speciation in response to late Tertiary geological events and unstable Pleistocene climates. DNA sequence data are consistent with recent diversification in Inga, a species-rich neotropical tree genus. We estimate that speciation was concentrated in the past 10 million years, with many species arising as recently as 2 million years ago. This coincides with the more recent major uplifts of the Andes, the bridging of the Isthmus of Panama, and Quaternary glacial cycles. Inga may be representative of other species-rich neotropical genera with rapid growth and reproduction, which contribute substantially to species numbers in the world's most diverse flora.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Richardson, J E -- Pennington, R T -- Pennington, T D -- Hollingsworth, P M -- New York, N.Y. -- Science. 2001 Sep 21;293(5538):2242-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh EH3 5LR, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11567135" target="_blank"〉PubMed〈/a〉
Keywords:
*Biological Evolution
;
Central America
;
DNA, Chloroplast/genetics
;
DNA, Plant/genetics
;
DNA, Ribosomal Spacer/genetics
;
*Ecosystem
;
*Fabaceae/classification/genetics/growth & development
;
Fossils
;
Genes, Plant
;
Phylogeny
;
*Plants, Medicinal
;
South America
;
Time
;
*Trees/classification/genetics/growth & development
;
*Tropical Climate
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
